/*
* Copyright 2011 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.powermock.core;
import java.util.AbstractSet;
import java.util.Iterator;
import java.util.Map;
public class IdentityHashSet<E> extends AbstractSet<E> {
protected final Map<E, Boolean> backedMap;
public IdentityHashSet() {
this.backedMap = new ListMap<E, Boolean>();
}
@Override
public int size() {
return backedMap.size();
}
@Override
public boolean contains(Object o) {
return backedMap.containsKey(o);
}
@Override
public boolean add(E o) {
return backedMap.put(o, Boolean.TRUE) == null;
}
@Override
public Iterator<E> iterator() {
return backedMap.keySet().iterator();
}
@Override
public boolean remove(Object o) {
return backedMap.remove(o) != null;
}
@Override
public void clear() {
backedMap.clear();
}
}